from datetime import datetime, timezone
from zoneinfo import ZoneInfo

def parse_time(maybe_time):
    if maybe_time:
        return datetime.fromisoformat(maybe_time[:-1] + '+00:00')
    
def filter_departures(departures):
    return [dep for dep in departures
            if dep['scheduled_departure_utc'] and
            parse_time(dep['scheduled_departure_utc']) >
            datetime.now().astimezone(timezone.utc)]

def format_time(maybe_time):
    if maybe_time:
        return str(maybe_time.astimezone(
            ZoneInfo('Australia/Melbourne')))[:-6]